openecu.org

Posted: **Mon Oct 09, 2006 3:45 pm**

Hello,
Can anyone help with the decoding of the mitsubishi EVO1 GSR EPROM ?. I have removed and socketed the EPROM from the ECU board and replaced with a socket for ease of removal. The data has been sucessfully read from the eprom (27c256) and i am viewing using hex workshop (eprom dump attached). However i am strugling to understand the code in terms of what is main code and ware are the data tables for fueling / ignition / boost solenoid duty / fuel pressure solenoid ECT. has anybody any info on the early import evos about how the ecu works and locations of data within the eprom as i am new to this and would like to try to change some parameters such as boost level and limits imposed by the factory software. There is little info on anything before the evo 4 many thanks to you all i am a newbie to this but do have an electronics / software background.
Simon. :?:

Posted: **Mon Oct 09, 2006 5:02 pm**

Any idea on the CPU?

Posted: **Mon Oct 09, 2006 6:38 pm**

High Oct fuel : 0x716Eh
Low Oct fuel : 0x7232h

High Oct Ign : 0x756Bh
Low Oct Ign : 0x768Bh

Injector scale : 0x1AFDh
Rev Limits : 0x43A4h,0x43A5h : 7500rpm
Speed Limits :0x5258h : 184Km

Posted: **Mon Oct 09, 2006 10:22 pm**

Freon wrote:Any idea on the CPU?

IMHO MH6111 - 6301 Custom edition. More detail on DSM forums.

Posted: **Tue Oct 10, 2006 12:59 pm**

Hello And many thanks for the info so far,
The microprocessor in this ECU appears to be a MH6211
Does anyone know the location of the boost solenoid control table as i am keen to raise the upper boost limits on the ecu.
many thanks
simon.

Posted: **Tue Oct 10, 2006 5:58 pm**

Maybe this could help you.
http://users.wpi.edu/%7Ektarry/dsmtech/dsmromedit.html

Posted: **Wed Oct 11, 2006 3:31 pm**

Wow! Nice find!

Posted: **Mon Jan 08, 2007 5:23 am**

Nice to see some other people with interests in this, but is useless unless we have someone that understands the processor and is able to disassemble the code.

At that point it's open house. I have been trying to get the DSM-ECU guys on "Yahoo Groups" to move to a forum based system, and share there knowledge openly, but there after several selfish people have taken there kind help, and tryed to resell it have locked up.

But there are a couple of people that are more than willing to help if you ask the right questions.

The "DSM-ECU" Yahoo group is a good resource for this.

Posted: **Fri Mar 16, 2007 11:20 am**

www.forum.autofixed.co.uk your answer lies here

openecu.org

Evo1 ECU decoding / map locations

Evo1 ECU decoding / map locations